added 2.3 compatiblity re: rsplit
added 2.3 compatiblity re: rsplit

armandobs14/rdflib,armandobs14/rdflib,yingerj/rdflib,marma/rdflib,yingerj/rdflib,ssssam/rdflib,armandobs14/rdflib,avorio/rdflib,dbs/rdflib,avorio/rdflib,dbs/rdflib,dbs/rdflib,marma/rdflib,armandobs14/rdflib,RDFLib/rdflib,yingerj/rdflib,marma/rdflib,ssssam/rdflib,RDFLib/rdflib,avorio/rdflib,ssssam/rdflib,avorio/rdflib,yingerj/rdflib,dbs/rdflib,RDFLib/rdflib,marma/rdflib,ssssam/rdflib,RDFLib/rdflib